If you've run into any of these issues while playing in the browser version of Boosteroid:
the cursor "jumps" to another monitor when you have more than one;
moving the cursor to the top of the screen triggers a system message about exiting fullscreen;
the cursor "jitters" in games - for example, when dragging items from your inventory into a chest;
you'd like to adjust mouse sensitivity to your liking
Try turning on the updated cursor capture mode. It locks the cursor to the game window and fixes these issues.
How to enable it:
Launch a game in your browser.
Exit fullscreen mode to open the session menu (by default, hold Esc).
Turn on the Lock cursor toggle.
If needed, adjust the Sensitivity slider for mouse sensitivity.
To release the cursor at any time, press Esc (you can change this key under Release cursor).